Period.

It can do, yes. Often a woman will notice her own personal smell changes at different times during the monthly cycle. This is normal. But an unpleasant smell that doesn't go away might a sign of an infection and you should see your doctor.

That's "might be a sign of an infection"

yes it can and does.

even during your period, you will smell very different

if after a week of the end of your period, you still do not smell right , go to a doctor.